Transcription of Chapter 5 MODBUS /OMRON Protocols Support - TRi PLC
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Chapter 5 MODBUS /OMRON Protocols Support - TRi PLC
Chapter 5 MODBUS /OMRON Protocols Support The T100M+ PLC supports a subset of the OMRON and MODBUS (Both ASCII and RTU modes are now supported) compatible communication Protocols so that it can be easily linked to third-party control software/hardware products such as SCADA software, touch panels etc. The PLC automatically recognizes the type of command format and will respond with the correct response. These are accomplished without any user intervention and without any need to configure the PLC at all! Both MODBUS and Omron Protocols use the same device ID address (00 to FF) as the native protocol described in Chapter 3. Since the addresses of I/O and internal variables in the T100M+ PLC are organized very differently from the OMRON or Modicon PLCs, we need to map these addresses to the corresponding memory areas in the other PLCs so that they can be easily accessed by their corresponding Protocols . All I/Os, timers, counters, internal relays and data memory DM[1] to DM[4000] are mapped as shown in table However, 32 bit variables and string variables are not mapped since they are fundamentally quite different in their implementation among different PLCs.
Chapter 5 MODBUS /OMRON Protocols Support 5-1 The T100M+ PLC supports a subset of the OMRON and MODBUS (Both ASCII and RTU modes are now supported) compatible communication
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